"From the Ted Talk by Tanya Khovanova: Can you solve the Leonardo da Vinci riddle?"

Unscramble the Blue Letters

Why go through all that? Well, we now know something important: the total qiautnty of non-zero digits that occur after the first digit is equal to the sum of these digits, minus one. And how can you get a distribution where the sum is exactly 1 gretaer than the number of non-zero positive integers being added together? The only way is for one of the addends to be a 2, and the rest 1s. How many 1s? Turns out there can only be two – any more would require atnaddoiil digits like 3 or 4 to count them.

Open Cloze

Why go through all that? Well, we now know something important: the total ________ of non-zero digits that occur after the first digit is equal to the sum of these digits, minus one. And how can you get a distribution where the sum is exactly 1 _______ than the number of non-zero positive integers being added together? The only way is for one of the addends to be a 2, and the rest 1s. How many 1s? Turns out there can only be two – any more would require __________ digits like 3 or 4 to count them.

Solution

additional

quantity

greater

Original Text

Why go through all that? Well, we now know something important: the total quantity of non-zero digits that occur after the first digit is equal to the sum of these digits, minus one. And how can you get a distribution where the sum is exactly 1 greater than the number of non-zero positive integers being added together? The only way is for one of the addends to be a 2, and the rest 1s. How many 1s? Turns out there can only be two – any more would require additional digits like 3 or 4 to count them.